如何通过索引从lua中的嵌套表中获取值？

-- 定义一个嵌套表
local nestedTable = {
  key1 = {
    subKey1 = "value1",
    subKey2 = "value2",
  },
  key2 = {
    subKey3 = {
      subSubKey1 = "value3",
      subSubKey2 = "value4",
    },
  },
}

-- 通过索引获取值
local value1 = nestedTable.key1.subKey1
local value2 = nestedTable["key1"]["subKey2"]
local value3 = nestedTable["key2"].subKey3.subSubKey1
local value4 = nestedTable.key2["subKey3"]["subSubKey2"]

print(value1) -- 输出 "value1"
print(value2) -- 输出 "value2"
print(value3) -- 输出 "value3"
print(value4) -- 输出 "value4"